package com.qsl.system.aspect;

import com.alibaba.fastjson.JSON;
import com.qsl.common.util.IpUtil;
import com.qsl.common.util.JwtHelper;
import com.qsl.model.system.SysOperLog;
import com.qsl.system.annotation.LogAnnotation;
import com.qsl.system.service.SysOperLogService;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpMethod;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindingResult;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Collection;
import java.util.Map;

@Aspect // 定义为AOP
@Component // bean
public class LogAspect {

    private static final Logger log = LoggerFactory.getLogger(LogAspect.class);

    @Autowired
    private SysOperLogService sysOperLogService;

    /**
     * 1.1定义切面-返回(对象)后通知，      pointcut：切入点           returning:返回
     * 注意：此通知必须在没异常的时候才能运行。
     *
     * @param joinpoint
     * @param controllerLog
     * @param jsonResult
     */
    @AfterReturning(pointcut = "@annotation(controllerLog)", returning = "jsonResult")
    public void doAfterReturning(JoinPoint joinpoint, LogAnnotation controllerLog, Object jsonResult) {
        System.out.println("==================>1111" + jsonResult);
        // 调用方法
        handleLog(joinpoint, controllerLog, null, jsonResult);
    }

    /**
     * 1.2 定义切面-异常后通知
     *
     * @param joinPoint
     * @param controllerLog
     * @param e
     */
    @AfterThrowing(value = "@annotation(controllerLog)", throwing = "e")
    public void doAfterThrowing(JoinPoint joinPoint, LogAnnotation controllerLog, Exception e) {
        handleLog(joinPoint, controllerLog, e, null);
    }

    /**
     * 2
     *
     * @param joinPoint
     * @param controllerLog
     * @param e
     * @param jsonResult
     */
    private void handleLog(final JoinPoint joinPoint, LogAnnotation controllerLog, final Exception e, Object jsonResult) {
        try {
            RequestAttributes ra = RequestContextHolder.getRequestAttributes();
            ServletRequestAttributes sra = (ServletRequestAttributes) ra;
            HttpServletRequest request = sra.getRequest(); // 获取

            //  *================数据库日志====================* //
            SysOperLog operLog = new SysOperLog();
            operLog.setStatus(0); // 状态（0正常 1异常)
            operLog.setOperIp(IpUtil.getIpAddress(request));  // Ip
            operLog.setOperUrl(request.getRequestURI());
            String token = request.getHeader("token"); // 请求头获取token
            String username = JwtHelper.getUsername(token); // 获取用户名
            operLog.setOperName(username);
            if (e != null) { // 报异常
                operLog.setStatus(1);
                operLog.setErrorMsg(e.getMessage());
            }
            // 设置方法名称
            String className = joinPoint.getTarget().getClass().getName();
            String methodName = joinPoint.getSignature().getName();
            operLog.setMethod(className + "." + methodName + "()");
            // 设置请求方式
            operLog.setRequestMethod(request.getMethod());
            // 处理设置注解上的参数
            getControllerMethodDescription(joinPoint, controllerLog, operLog, jsonResult);
            // 保存数据库
            sysOperLogService.saveSysLog(operLog);
        } catch (Exception ex) {
            // 记录本地异常日志
            log.error("==前置通知异常==");
            log.error("异常信息:{}", ex.getMessage());
            ex.printStackTrace();
        }
    }

    /**
     * 获取注解中对方法的描述信息-用于Controller层注解
     *
     * @param joinPoint
     * @param log        自定义日志注解
     * @param operLog    操作日志参数
     * @param jsonResult
     */
    private void getControllerMethodDescription(JoinPoint joinPoint, LogAnnotation log, SysOperLog operLog, Object jsonResult) {
// 设置action动作
        operLog.setBusinessType(log.businessType().name());
        operLog.setTitle(log.title()); // 模块标题
        // 设置操作人类别
        operLog.setOperatorType(log.operatorType().name()); // 操作类别（0其它 1后台用户 2手机端用户）
        // 是否需要保存request，参数和值
        if (log.isSaveRequestData()) {
            // 获取参数的信息，传入到数据库中。
            setRequestValue(joinPoint, operLog);
        }
        // 是否需要保存response，参数和值
        if (log.isSaveResponseData() && !StringUtils.isEmpty(jsonResult)) {
            operLog.setJsonResult(JSON.toJSONString(jsonResult)); // 数据转为JSON格式
        }

    }

    /**
     * 获取请求的参数，放到log中
     *
     * @param joinPoint
     * @param operLog   操作日志
     */
    private void setRequestValue(JoinPoint joinPoint, SysOperLog operLog) {
        String requestMethod = operLog.getRequestMethod(); // 请求方式
        // 判断是否是新增或修改请求
        if (HttpMethod.PUT.name().equals(requestMethod) || HttpMethod.POST.name().equals(requestMethod)) {
            String params = argsArrayToString(joinPoint.getArgs());
            operLog.setOperParam(params);
        }
    }

    // 参数拼装
    private String argsArrayToString(Object[] paramsArray) {
        String params = "";
        if (paramsArray != null && paramsArray.length > 0) {
            for (Object o : paramsArray) {
                if (!StringUtils.isEmpty(o) && !isFilterObject(o)) {
                    try {
                        Object jsonObj = JSON.toJSON(o); // 将Java对象转为JSON字符串
                        params += jsonObj.toString() + " ";
                    } catch (Exception e) {

                    }
                }
            }
        }
        return params.trim();
    }


    /**
     * 判断是否需要过滤的对象。
     *
     * @param o 对象信息。
     * @return 如果是需要过滤的对象，则返回true；否则返回false。
     */
    private boolean isFilterObject(Object o) {
        Class<?> clazz = o.getClass();
        if (clazz.isArray()) {
            return clazz.getComponentType().isAssignableFrom(MultipartFile.class);
        } else if (Collection.class.isAssignableFrom(clazz)) {
            Collection collection = (Collection) o;
            for (Object value : collection) {
                return value instanceof MultipartFile;
            }
        } else if (Map.class.isAssignableFrom(clazz)) {
            Map map = (Map) o;
            for (Object value : map.entrySet()) {
                Map.Entry entry = (Map.Entry) value;
                return entry.getValue() instanceof MultipartFile;
            }
        }
        // instanceof: 判断它左边的对象是否是它右边的类 或该子类的实例
        return o instanceof MultipartFile || o instanceof HttpServletRequest || o instanceof HttpServletResponse
                || o instanceof BindingResult;
    }

}



